Assigkkto b to aboffistrong



Patented ct. 7, 1924.

.UNHTEQ STATES than? paraat* ,vri-rica. Y

dit 1 j' ING COMPANY, or WATERLOO, iowa. v

APPARATUS FOR sI-rArINe DRILL Br'rs.`l`

Application filed January 2, 1924.y Serial No. 684,082.

To @ZZ whom it may concern .Be it known that I, GEORGE R. VArsoN, a citizen of the United States of America, anda resident of Vfaterloo, Black Hawk County, Iowa, have invented certain new and useful. Improvements in Apparatus for `Shaping Drill Bits, offwhich the following is a specification.

My invention relates to improvements in apparatus for shaping drill-bits, and the object of my improvement is to provide adjustable supporting-means for a drill while having its bit shaped byi means of a reciprocatory die, this means being devised for convenient hand operation and adjustments.

This object I have accomplished by the means which` are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Fig. 1 is a side elevation of my improved apparatus with a drill mounted thereon, parts yof the supporting means being broken away, and other parts sectioned or broken away, and Fig. 2 is a top plan view of the same.

In said drawings, the numeral 1 denotes a longitudinally spaced pair of base-blocks made of concrete upon which are superposed blocks of wood, and upon these wooden blocks are bolted the transversely spaced parallel metal side-beams 2.

Upon these beams 2 near one end are alined bearing-boxes in which are journaled the end parts of a rotatable shaft carrying a belt-wheel 23 having thereon a drivingbelt 24, and one face of the belt-wheel being coned for braking contact of al friction-clutch member 25. The shaft intermediate said boxes has a crank 21 with a pitman or connecting-rod 32 which is terminally connected to the middle of a powerful semi-elliptic spring 2O,` the ends of the spring having rod connections 33 with a reciprocable plunger' or hammer-head 18, the latter carrying a detachable die-head 19.

' The numeral 34 denotes inwardly directed ribs on the beams 2 and upon which are slidably mounted a gage-ring carrier 3 and a thrust-block 14. The carrier 3 and t-he thrust-block 14 are longitudinally spaced but are connected by means of one or more connecting bars 11 terminally mounted on studs l() and 13 respectively projecting from said parts. For purposes of varying the amount of longitudinal separation between these parts 3 and 14, the bar llhas a longitudinal row of holes 'l2 `to receive said stud 13 interchangeably. y

rThe numeral 29 denotes an elongatedgdrill of the usual `type 'employed to .drill well-l holes. `This drill has a diminished threaded` shank upon which maybe mounted athrustcap 30 havinga pair yof like annular ribs, each with one face sloped. The numerall, denotes a semi-cylindrical hollow body, being the upper partv offa` thrust-block 14 whosel hollow wall lis shaped withribs 16 which are mates of theother ribs 31 on the thrust-cap and to be engaged therewith for. longitudinal adjustment of the thrust-cap. This permits sidewise rocking of thev thrustcap and drill withoutl disengagement from,

the-thrust-block in the operation Of reversing the position of the drill-bit while being operated upon by the die 19.

The numeral 26 `denotes a gage-ring interiorly shaped for the offsetting of the softened heated drill-bit thereinto under the blows of the die 19. lThe carrier 3 has a half ring project-ion orrib which seats in.

ingly receive a pin 6 on a lever 7 which lever is terminally pivoted at-8 to ak block` 9 on one beam 2. The drill 'having been' fitted with said thrust-cap 30 .and .with the gage-ring to be coterminous therewith, may be laid upon the support-ing means with the gage-ring o n the carrier 3, the ribs 31 engaging ribs of the thrust-block. The relative `position of the gage-ring and the drill are first to be determinedand adjustably made by fitting the stud `13 into an appropriate hole 12 of the draft-bar 11. Then the operator may shift the lever 7 `to bringthe drill forwardly!v to a greater or less distance relatively to the die 19 to permit the die to strike blows of the desired power upon the drill-bit, and the drill kmay be shifted rockingly sidewise back and forth reversely to permit the die to treat the bit as necessary in shaping it.

Having described myk invention, whatl claim as new, and desire by secure by Letters Patent, is:

1. An apparatus ofthe character .de-

scribed, comprising supporting-means, a spaced and connected thrust-block and gagering carrier mounted for detachable and adjustable support upon said supporting means, a gage-ring detachably connected to said gage-ring carrier, a thrust-cap for detachable engagement with one end of a drill and having engaging-devices thereon, said thrust-block having a plurality'of engagingdevices thereon to co-mate with the engaging-devices on said thrust-cap for longitudinal adjustments therebetween, and manually operable means for shifting said connected gage-ring carrier and thrust-block to and iro.

2. An apparatus of the character described, comprising supporting-means, a spaced and adjustably connected thrustblock and gage-ring carrier mounted for detachable and adjustable supportupon said supporting-means, a gage-ring to receive the bit end of a drill and detachably connected to said gage-ring carrier for rocking ei'igagcment therewith, a thrust-'cap for detachable engagement with the other end of the drill and having annular ribs thereon, said thrust-block having' a plurality of co-mating half-rings thereon to engagingly' andl adjustably receive thesaid annular ribsinterchangeably for longitudinal adjustment of the thrust-cap relative to the thrust-block While permitting rocking engagement of the 'former upon the latter, a hand-lever pivoted on said supporting-means, and a slotted projection on said gage-ring carrier, said lever having'a pin projection Slidable in said slotted projection Wherebyl the lever may be used to longitudinally shift `said' connected carrier aiidthrust-block'to and fro.

'3. In combination, a 'carrying-device for a drill having adjustably connected parts, a reciprocat'ory die-'head aline'd With said device to operate upon an endoi' a to'ol or drill carried by' said device, andv means for supporting said carrying-device including comating annular 'engaging devices thereon for interoh angeable' adj ustable engagement `With mating annular engaging means mounted on the drill,y permitting rocking relative movements of 'the drill.

Signed at laterloo, Iowa, this th day of Deo. 1923.

encuen a. WATsoN, 

